C. 6.81x10^-4
It is negative 4 because the 6 is 4 digits away from the first 0.
Scientific notation has one number and then the decimal place so it can not be A or E.
Answer:
Yellow stars have the highest brightness
Explanation:
Answer:
Most Living organisms breathe in oxygen and breathe out carbon dioxide so looking at the phrasing it appears to be false.
Explanation: